2. Make sure that the cooling system is not dirty or
blocked.
To examine the spark plug
CAUTION: Always use the recommended
spark plug type. Incorrect spark plug type
can cause damage to the product.
• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a)
Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, refer to
Technical data
on page 13
.
• Replace the spark plug if it is necessary.
To clean the air filter
Clean the air filter regularly from dirt and dust. This
prevents carburetor malfunctions, starting problems,
loss of engine power, wear to engine parts and more
fuel consumption than usual.
1. Remove the air filter cover (A).
2.
Remove the foam filter (B) and the felt filter (C) from
the filter frame.
3. Replace the felt filter (C).
4. Clean the foam filter (B) with warm soap water.
Note:
An air filter that is used for a long time can not
be fully cleaned. Replace the air filter regularly and
always replace a defective air filter.
5. Make sure that the foam filter (B) is dry.
6. Apply air filter oil to the foam filter (B). Refer to
To
apply oil to the air filter on page 11
7. Clean the inner surface of the air filter cover (A). Use
compressed air or a brush.
To apply oil to the air filter
CAUTION: Always use Husqvarna special
air-filter oil. Do not use other types of oil.
WARNING: Put on protective gloves. The
air-filter oil can cause skin irritation.
1. Put the air filter in a plastic bag.
2. Put the oil in the plastic bag.
3.
Rub the plastic bag to supply the oil equally across
the air filter.
4. Push the unwanted oil out of the air filter while in the
plastic bag.
864 - 003 - 19.03.2019 11
